1325411 - The sharing drop down displays incorrect number of open windows for some applications

Status: NEW

(Core :: WebRTC, defect, P3)

Description

[Iulia Cristescu, QA [:JuliaC] (away, please needinfo? [e-mail])]

[Affected versions]:
- latest Nightly 53.0a1 (2016-12-22)
- latest Aurora 52.0a2 (2016-12-22)
- 51.0b9 (20161219140923)
- 50.1.0 (20161208153507)

[Affected platforms]:
- Windows 8.1 x86
- Windows 10 x64

[Steps to reproduce]:
1. Lanuch Firefox
2. Navigate to about:config and confirm that:
   * media.getusermedia.screensharing.allow_on_old_platforms is false;
   * media.getusermedia.screensharing.enabled is true 
   * media.getusermedia.screensharing.allowed_domains is set to many different websites, including mozilla.github.io
3. Go to https://mozilla.github.io/webrtc-landing/gum_test.html 
4. Open Windows Explorer or Microsoft Edge 
5. Click the Application button and look for the application chosen in step 4

[Expected result]:
- The number of open windows shown in the share drop down correspond with the real number of open windows for the chosen application

[Actual result]:
- The sharing drop down displays incorrect number of open windows (e.g. for Windows Explorer, the drop down displays 5 windows instead of 1; for Microsoft Edge, the drop down displays 2 windows instead of 1)

[Regression range]:
- This issue is not a recent regression, as is reproducible all the way back to Firefox 42

[Additional notes]:
- The issue is not reproducible on Mac and Ubuntu platforms

Comment 1

[Nils Ohlmeier [:drno]]

Ilulia does this only happen with Windows Explorer and Edge or with all applications?

Comment 2

[Iulia Cristescu, QA [:JuliaC] (away, please needinfo? [e-mail])]

(In reply to Nils Ohlmeier [:drno] from comment #1)
> Ilulia does this only happen with Windows Explorer and Edge or with all
> applications?

No, this issue doesn't happen with all applications. Until now, I found just 3 applications that generate this situation: Windows Explorer, Microsoft Edge and Skype.

Comment 3

[Randell Jesup [:jesup] (needinfo me)]

Edge does something Very Funky with windows; there are other issues with sharing Edge (starting with the area edge is displayed in is marked as not part of the application, and areas it *isn't* displayed in are marked as part of the application (and visible).

We can ping Shijun, though it's really not his direct area.

Comment 4

[Randell Jesup [:jesup] (needinfo me)]

Upped priority based on the Edge sharing issues; the "number of windows" shown being wrong would be p2/29 probably

Comment 5

[Julien Cristau [:jcristau]]

Mass wontfix for bugs affecting firefox 52.

Comment 6

[Bulk Bug Changes for mreavy's org]

Mass change P2->P3 to align with new Mozilla triage process.

Comment 7

[Kimberly Seo]

Attachment: same problem

Thanks from railagera1982.